IE = navigator.appName=="Microsoft Internet Explorer";
	NS = navigator.appName=="Netscape";
	bVer = parseInt(navigator.appVersion);
	var newWin=null;
	function PopUp(loc_ie, name, width, height) {
	        var _params = "width="+width+",height="+height+",resizable=no,status=no,scrollbars=0";
			loc_ns = loc_ie;
	
	        if (bVer >= 4) {
	                 _left = ( (screen.width-width) >>1 );
	                 _top = ( (screen.height-height) >>1 );
	        } else {
	                 _left = ( (800-width) >>1 );
	                 _top = ( (600-height) >>1 );
	        }
	
	        if (IE) _params += ",top=" + _top + ",left=" + _left;
	        else if (NS) _params += ",screenX=" + _left + ",screenY=" + _top;
	
	        if (IE) newWin = window.open(loc_ie, name, _params);
	        else if (NS) newWin = window.open(loc_ns, name, _params);
	
	        if ( newWin!=null && !(IE && bVer<5) )
	                newWin.focus();
	}